Cincinnati development fits inline system into constricted urban environment
MadTree Brewing is one of Cincinnati’s fastest-growing craft breweries, creating beers such as PsycHOPathy, Happy Amber and LIFT. A new $18-million production brewery, taproom and event center was constructed in the former RockTenn Building in the Oakley neighborhood in Cincinnati. The project is serving as an anchor for the Oakley business district while bringing new jobs into the city and the neighborhood.
The construction of the new facility created a need for a detention system to capture runoff from the roof, parking lot and other impervious surfaces.
Engineers at IBI Group designed an inline detention system made from 395 linear ft of 72-in.-diameter, 16-gauge aluminized steel Type 2 that provides 12,201 cu ft of storage.
Corrugated metal pipe (CMP) was selected, as it provides the flexibility to meet multiple site constraints, including a constricted urban environment and several utility conflicts. Contech provided full design assistance and delivered a complete system by manufacturing the pipe and custom fabrications, including elbows, stubs, risers and an outlet control weir plate needed for this unique system. Using the flexibility of CMP and inline detention, cost savings were realized by eliminating all concrete structures, as would typically be needed with a traditional storm sewer system—risers were used in place of concrete catch basins, custom elbows were used wherever a bend in the system was needed, and a prefabricated weir plate replaced the need for a concrete outlet control structure.
Installation used excavators with straps to sit the pipe, gaskets and steel bands for the joints, and a rock thrower to backfill around and between the pipe barrels.